Bach 3E vs Bob Reeves 42/ES/692
The Bob Reeves 42/ES/692 has a wider cup diameter, the Bach 3E features a deeper cup.
Mouthpiece A
Bach 3E
• Trumpet
Cup diameter16.30 mm
Cup depthShallow
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
vs
Mouthpiece B
Bob Reeves 42/ES/692
• Trumpet
Cup diameter16.67 mm
Cup depthVery shallow
Rim width—
Throat diameter—
Backbore692
Finish—
Material—
Cup Diameter
The Bob Reeves 42/ES/692 has a cup diameter of 16.67 mm compared to 16.30 mm on the Bach 3E — a difference of +0.37 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Bach 3E has a shallow cup while the Bob Reeves 42/ES/692 has a very shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Which is better?
Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.